Hi,
Is it possible that only build the runtimes like libstdc++, libgcc_s_sjlj-1
with LTO enabled?
Someone static link it with LTO can benefit form it.
Thanks!
2013/9/24 xunxun <xunxun1...@gmail.com>
> 于 2013/9/24 星期二 22:21, Alexey Pavlov 写道:
> > 2013/9/24 xunxun <xunxun1...@gmail.com>:
> >> 于 2013/9/24 星期二 20:41, niXman 写道:
> >>> 2013/9/24 xunxun:
> >>>> You can see http://gcc.gnu.org/ml/gcc/2013-03/msg00210.html
> >>> Build time will be increased approximately by 400 percent, in order to
> >>> increase compilation speed by 10 percent. I do not see the any point
> >>> in doing this...
> >>>
> >>>
> >> 400% for the builder, but 10% for the user
> >>
> > Now building all 8 bootstrapped toolchains under Windows taked about 1
> > day. Building them with PGO+LTO increase it to 4! days. It's very long
> > time.
> You can only build native toolchain. I don't think PGO can be useful for
> cross toolchains.
>
> And as said by the link, PGO is much better than LTO at present, so you
> can only use PGO, which cost shorter time.
> >
> > Regards,
> > Alexey.
> >> --
> >> Best Regards,
> >> xunxun
> >>
>
>
> --
> Best Regards,
> xunxun
>
>
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